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Flatten array to 1 line in JavaScript
Suppose, we have a nested array of numbers like this −
const arr = [ [ 0, 0, 0, −8.5, 28, 8.5 ], [ 1, 1, −3, 0, 3, 12 ], [ 2, 2, −0.5, 0, 0.5, 5.3 ] ];
We are required to write a JavaScript function that takes in one such nested array of numbers. The function should combine all the numbers in the nested array to form a single string.
In the resulting string, the adjacent numbers should be separated by a whitespaces and elements of two adjacent arrays should be separated by a comma.
Example
The code for this will be −
const arr = [
[ 0, 0, 0, −8.5, 28, 8.5 ],
[ 1, 1, −3, 0, 3, 12 ],
[ 2, 2, −0.5, 0, 0.5, 5.3 ]
];
const arrayToString = (arr = []) => {
let res = '';
for(let i = 0; i < arr.length; i++){
const el = arr[i];
const temp = el.join(' ');
res += temp;
if(i !== arr.length − 1){
res += ',';
}
};
return res;
};
console.log(arrayToString(arr));Output
And the output in the console will be −
0 0 0 −8.5 28 8.5,1 1 −3 0 3 12,2 2 −0.5 0 0.5 5.3
Updated on: 21-Nov-2020
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